Question

please answer fast correct will be marked brainliest​

Answer 1

Answer:

a = 1 , b = -1, c = 2

so , (a+3b-4c)+(4a-b+9c)

= {(1)+3(-1)-4(2)}+{4(1)-(-1)+9(2)}

= 1-3-8+4+1+18

= 24-11

= 13

and 13 - {2a-3b+4c)

= 13-{2(1)-3(-1)+4(2)

= 13-(2+4+8)

= 13-(14)

= -1

answer is -1

thanks